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Category: Chemistry

How to perform stoichiometric calculations

Stoichiometry is the calculation of reactants and products in a chemical reaction. What’s a mole? Before we dive in, let me introduce you the concept of mole: a mole (symbol mol) is the quantity of matter, equal to the mass of a substance divided by its molar mass. But wat is this? Molar mass The molar mass of a substance is defined as the mass of a mole of that substance and is therefore measured in grams per mole (g/mol). These are the things you need to know in order… Read more How to perform stoichiometric calculations

How to balance a chemical equation

Balancing a chemical equation is very important in order to calculate the amount of reagents needed and the products in a reaction. After all, it’s an equation, so you must have the same quantities on both sides. Let’s take the reaction between hydrogen and oxygen, which yields water: That small number specifies the number of atoms of an element and it can’t be changed. Here, the elements are hydrogen H and oxygen O, but they exist as biatomic gases, which means two atoms of hydrogen make a molecule and the… Read more How to balance a chemical equation

How to make copper (II) chloride: base – acid method

In this post you will learn how to produce pure copper (II) chloride (CuCl₂) using basic copper carbonate, Cu2(OH)2CO3 , which I’ll tell you how to prepare as well. These two are the kind of reactions that will result in quantitative yields if done correctly without much pouring from one container to another. Chemicals needed for 126,80 g of copper (II) chloride: 185,71 g copper sulfate pentahydrate (CuSO4 ⋅ 5H2O ) 130 g sodium bicarbonate (NaHCO3) x g hydrochloric acid (HCl), where x is equal to 5500/conc. % Prepare the… Read more How to make copper (II) chloride: base – acid method

How to write a chemical equation | Basics

Chemistry happens everywhere at any time: in our body chemical reactions allow to digest and break down fats, proteins, to transport hormones, to remove old cells, to carry the oxygen we breathe to our blood; combustion is a chemical reaction, photosynthesis is a chemical reaction as well. Chemistry is a fundamental part of science without which we could not explain many, and I say many things. As a kid, you probably did the “volcano experiment” at least once: you simulated an eruption by mixing vinegar and baking soda. What happened?… Read more How to write a chemical equation | Basics

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